EN-GJL-200
Cast iron with lamellar graphite
Cast iron with lamellar graphite contains between 2.6 % and 3.6 % carbon, which is present as graphite in the form of fine lamellae. These lamellas run through the cast material in a fine-needled mesh and, due to the notch effect, produce its relatively low strength and brittleness..
Cast iron with lamellar graphite can be subjected to various heat treatments (e.g. hardening, nitriding, tempering) to improve its properties. A high proportion of perlite in the basic structure is advantageous for heat treatments.
| Casting type | Cast iron with lamellar graphite |
| Material No. | EN-JL-1030 |
| US Standard (AISI) | No 20 B |
| DIN EN 10027-2 | 5.1300 |
| Abbreviation | EN-GJL-200 |
| Old designation | GG20 DIN 1561 |
| Composition [%] | C: 2.95-3.45 Si: 2.10-2.90 Mn: 0.55 - 0.75 P: 0.10 - 0.20 S: 0.04 - 0.07 |
| Density [g/cm³] | 7.15 |
| R0.2 N/mm² Yield point | - |
| 0.1 % - Yield point Rp0.1 N/mm² | 130 - 195 |
| Tensile strength Rm [N/mm²] | 200 - 300 |
| Brinell hardness HB30 Sample <30mm | 180 - 220 |
| Elongation at fracture A% | 0.8 - 0.3 |
| E-modulus E KN/mm² | 88 - 113 |
| Compressive strength Sdb N/mm² | 720 |
| Machinability | very good |
| Weldability | limited, weldable with special electrodes |
| Compressive strength | good |
| Dry-running properties | good |
| Thermal conductivity | good |
| Vibration-absorbing property | good |
| Castability | very good |
| Other properties | - |
| Structure | Ferritic/pearlitic |
| Main applications |
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Information for reference only; we do not assume any liability for its accuracy. Properties of steel materials are highly dependent on thermal and/or mechanical treatment.